1000836840 has 32 divisors (see below), whose sum is σ = 3002510880. Its totient is φ = 266889792.

The previous prime is 1000836817. The next prime is 1000836841. The reversal of 1000836840 is 486380001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1000836798 and 1000836807.

It is not an unprimeable number, because it can be changed into a prime (1000836841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4170034 + ... + 4170273.

It is an arithmetic number, because the mean of its divisors is an integer number (93828465).

Almost surely, 2^1000836840 is an apocalyptic number.

1000836840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000836840 is an abundant number, since it is smaller than the sum of its proper divisors (2001674040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1000836840 is a wasteful number, since it uses less digits than its factorization.

1000836840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8340321 (or 8340317 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 1000836840 is about 31636.0054368436. The cubic root of 1000836840 is about 1000.2788688916.

The spelling of 1000836840 in words is "one billion, eight hundred thirty-six thousand, eight hundred forty".